PMID- 30529855 OWN - NLM STAT- MEDLINE DCOM- 20190221 LR - 20231213 IS - 1879-1298 (Electronic) IS - 0045-6535 (Linking) VI - 219 DP - 2019 Mar TI - Preparation of magnetic polyimide@ Mg-Fe layered double hydroxides core-shell composite for effective removal of various organic contaminants from aqueous solution. PG - 66-75 LID - S0045-6535(18)32316-6 [pii] LID - 10.1016/j.chemosphere.2018.11.209 [doi] AB - In this work, a novel core-shell structured magnetic polyimide@layered double oxides (LDO) composites coating a porous polyimide (PI)-coated Fe(3)O(4) magnetic core and layered double hydroxide (LDH) has been successfully synthesized by solve-thermal synthesis and co-precipitation process. The magnetic PI@LDO composites were characterized by scanning and transmission electron microscopy (SEM and TEM), X-ray diffraction (XRD), thermogravimetry analysis (TGA) and magnetic properties analysis. The composite materials displayed core-shell structure with flower-like morphology. The magnetic PI@LDO composites were applied to remove tetracycline (TC), 2,4-dichlorophenol (2,4-DCP) and glyphosate (GP) from aqueous solution. The action pH value was ranged from 5 to 9 for TC and GP and 3 to 7 for 2,4-DCP, respectively. Cl(-) showed a weak competitive adsorption effect to TC, 2, 4-DCP and GP. In addition, the presence of humic acid (HA) could slightly reduce the adsorption capacity of magnetic PI@LDO composites. The adsorption process could be well described by pseudo-second-order model for TC and GP, while pseudo-first-order model for 2,4-DCP. The experimental data of TC and 2,4-DCP could be fitted better with Freundlich model, while that of GP were fitted better with Langmuir model. The adsorptions of TC, 2,4-DCP and GP were both spontaneous and endothermic. The adsorption capacity decreased slightly after adsorption-desorption cycles repeated five times. This study demonstrated that magnetic PI@LDO exhibited great potential to be a mild and cost-effective adsorbent for the removal of various organic contaminants from wastewater. CI - Copyright (c) 2018 Elsevier Ltd. All rights reserved. FAU - Wu, Hanjun AU - Wu H AD - School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430074, Hubei, China; Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, Hubei, China. FAU - Zhang, Huali AU - Zhang H AD - School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430074, Hubei, China. FAU - Zhang, Weijun AU - Zhang W AD - School of Environmental Studies, China University of Geosciences, Wuhan, 430074, Hubei, China. Electronic address: zhangweijun@cug.edu.cn. FAU - Yang, Xiaofang AU - Yang X AD - State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China. FAU - Zhou, Hong AU - Zhou H AD - School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430074, Hubei, China. FAU - Pan, Zhiquan AU - Pan Z AD - School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430074, Hubei, China. FAU - Wang, Dongsheng AU - Wang D AD - Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, Hubei, China; State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China. LA - eng PT - Journal Article DEP - 20181203 PL - England TA - Chemosphere JT - Chemosphere JID - 0320657 RN - 0 (Chlorophenols) RN - 0 (Humic Substances) RN - 0 (Hydroxides) RN - 0 (Imides) RN - 0 (Oxides) RN - F8VB5M810T (Tetracycline) RN - R669TG1950 (2,4-dichlorophenol) RN - TE7660XO1C (Glycine) SB - IM MH - Adsorption MH - Chlorophenols/isolation & purification MH - Glycine/analogs & derivatives/isolation & purification MH - Humic Substances MH - Hydroxides/*chemistry MH - Imides/chemistry MH - *Magnetics MH - *Oxides/chemistry MH - Tetracycline/chemistry MH - Water Purification/*methods MH - Glyphosate OTO - NOTNLM OT - Adsoption behavior OT - Core-shell structure OT - Magnetic polyimide@ layered double oxides composites OT - Organic contaminants OT - Regeneration EDAT- 2018/12/12 06:00 MHDA- 2019/02/23 06:00 CRDT- 2018/12/12 06:00 PHST- 2018/08/03 00:00 [received] PHST- 2018/11/24 00:00 [revised] PHST- 2018/11/29 00:00 [accepted] PHST- 2018/12/12 06:00 [pubmed] PHST- 2019/02/23 06:00 [medline] PHST- 2018/12/12 06:00 [entrez] AID - S0045-6535(18)32316-6 [pii] AID - 10.1016/j.chemosphere.2018.11.209 [doi] PST - ppublish SO - Chemosphere. 2019 Mar;219:66-75. doi: 10.1016/j.chemosphere.2018.11.209. Epub 2018 Dec 3.